Probability Random Variables and Random Signal Principles

The primary goals of this book are to introduce the reader to the principles of random signals and to provide tools whereby one can deal with systems involving such signals . Toward these goals ,perhaps the first thing that should be done is define what is meant by random signal .A random signal is a time wavaform that can be characterized only in some probabilistic manner .In general ,it can be either a desired or undesired waverorm.